Educational chart.



Patented lu ly 9, IQUL B. H. ANDERSON. EDUCATIONAL CHART. Appliclativon 1011 Oct. 20, 1990.)

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No. 677,9l5.

(No Modql.)

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RICHARD ROBERT ANDERSON, OF ALBION, IOVA.

EDUCATIONAL CHART.

SPESIFCATION forming part of Letters Patent No. 677,915, dated July 9, 1901. Application tiled October 20, 1900. Serial No. 33,758. (No model) To all whom t may concern;

Be it known that I, RICHARD ROBERT AN- DERSON, a citizen of the United States, residing at Albion, inthe county of Marshall and State of Iowa, have invented a new and useful Educational Ohart, of which the following is a specification.

This invention relates to a chart for educational purposes; and the object of the same is to provide simple and effective means for displaying before a pupil or class of scholars a plurality of problems or examples involving the different fundamental or other mathematical rules or other matter which can be easily changed in character and new problems or other matter presented by a simple adjust ment and without the delay and inconven-y ience incident to outlining or placing the same on a blackboard or other device.

The invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter described and claimed. v

In the drawings, Figure lis afront elevation of a chart embodying the features of the invention. Fig. 2 is a rear elevation ofthe same. Fig. Sis an edge elevation. Fig. t is a hor'izontal section.

Similar nu-merals of reference are employed to indicate corresponding parts in the several views. l

The numeral 1 designates opposite side bars, which are preferably cylindrical and of a length proportionate to the remaining portions and the general dimensions of the chart. The lower ends of the bars are reduced to form supporting-legs, and the upper ends are rigidly connected by a cross-piece 2, having eyes 3 for hanging the chart, if such disposition thereof is desired. The bars are formed with a series of circumferential grooves 4 of different lengths to provide seats for a series of transversely-extending slidable belts 5 and 6, the belts 5 being broader than the belts 6 and accordingly engaging the wider grooves 4. The lower portions of the bars, near the legs, are also rigidly connected by Va cross-piece 7, and applied to the front edges of both crosspieces 2 and 7 are clamping-strips 8, between which and the said cross-pieces the upper and lower ends of a chart 9 are secured and located in front of the belts 5 and 6. The

followed by question-marks.

chart t) is to be formed of a continuous piece or web of any suitable or preferred material, so that it can be completely removed at one operation and another of different structure substituted therefor, and at the points where the belts extend across the same it is formed with transversely-alined series of slots 10 of diiferent lengths and widths in the different series to accommodate the display of vertical lines of figures of varying extent, single whole numbers, and fractions carried by the belts and other attachments, which will be subsequently explained. To the opposite edges of the chart 9 apertured straps or stretchers 1l are secured for adjustable engagement with buckles or analogous devices'12, attached to the bars l, and by this means the chart can be transversely stretched or drawn taut to give it a positive position.

Secured on the back of the chart 9 and extending longitudinally thereof in parallel relation are a series of holding-strips 13, transversely stitched at regular intervals to form guide-loops 14.-, (see Fig. 2,) through which the belts are passed, and thereby caused to move closely againstthe rear side of the chart to bring the numerals or figures close up to the slots lO and prevent the said lbelts intermediately sagging. In conjunction with a portionof the lower slots l0 rotatable disks l5, of suitable material, are employed and operated to bring whole numbers or fractions arranged thereon in a circular line before said' slots. tical columns'of numerals arranged in accordance with any system of numerical deduction that may be desired to be pursued and complementary to columns 16 of numbers, ab breviated measures, and arithmetic signs and queries or question-marks. The first line of slots l0 at the upper portion of the chart in the present instance has a line of numbers to the left adjacent to multiplication-signs on the same side, and on the left side of each of these slots are signs representing equal and By this means multiplication can be easily and simply taught. The second line of slots are arranged for pursuing the addition of different measures, and two slots are employed to complete each problem. The third line of slots have numbers and suitable signs for presenting The belts are Vprovided with veri IOO various problems in subtraction. The fourth line of slots are provided with means for presenting problems in multiplication having the multiplicands of higher denomination than those of the first line of slots, and the fifth line of slots have means for preparing and presenting problems in division. The sixth line of slots have means displayed in relation thereto for presenting miscellaneous problems in addition and subtraction for use with the belt 5, movable in rear thereof, and the next two lines of slots at the bottom are reduced in dimensions and arranged in pairs, the disks heretofore set forth being rotatable behind the first slot of each pair, and the numerals on the belts 6 are `exposed through the second slots to the right. The disks are operated between the belts 6 and the disks, and by means of this combination of parts various problems in whole numbers and fractions can be presented and changed at will by the rotation of the disks without shifting the belts 6. These disks can be used with the other lines of slots, and instead of the precise series of numbers shown and the mathematical procedure indicated bythe signs in con- A, junction therewith other problems can be readily expressed and other charts employed. In fact, a number or certain complement of charts could be supplied with each complete device, and thus a Wide range of modification in presenting problems cou-ld be obtained. The improved device can also be used for imparting knowledge in other lines of study by simply changing the characters on the belts and chart, and as the parts are simple the device can be produced and sold at a small cost.

`In order that the chart may be supported on a floor or other surface, a cross-rod 17 is movably attached at its ends to lthe bars l at y a suitable elevation, and depending from the center of the same is a prop 18, as shown by Figs. 2 and.

The preferred form of the improved device has been shown and described; but it is obvious-ly apparent that changes in the form, size, proportions, and minor details may be resorted to without departing from the principle of the invention.

Having thus described the invention, what is claimed as new is- 1. A device of the class set forth comprising a supporting-frame, a plurality of c'on- 1 tinuous belts movable transversely of the l frame and bearing on the side portions of the latter, said belts having numbers, characters or the like at intervals thereon, a chart consisting of a continuous web of suitable material removably clamped at its upper and lower ends to the upper and lower ends of the frame and arranged in front of said belts, the chart having tran sversely-alined series of slots with characters or numbers and signs adjacent the edges thereof to conj unctively aline with the corresponding devices on the belts, means for removably fastening the sides of the chart to the sides of the frame, and longitudinally-extending strips on the back of the chart having loops at intervals through which the belts have movement.

2. A device of the character set forth, comprising supporting devices, a series of belts movable over said supporting devices and having characters, numbers, or the like, arranged thereon, a chart in front of said belts having openings therein for exposing portions of the latter, and rotatable disks attached to the chart and operating between thev latter and portions of the belts.

3. A device of the character set forth comprising supporting devices connected by upper and lower cross-pieces, belts shiftably mounted on said devices and having numbers thereon, fastenings also attached to said` devices, a chart in front of the belts having lines of openings therein for exposing the numbers on the belts and also provided' with numbers, measure indications and signs, stretching devices attached to the side edges of the chart and adj ustab'ly attachable to said fastenings, and' clamping-strips secured to the cross-pieces and holding the upper and lower ends of the chart.

4. vA device of the character set forth com-l prising supporting devices, shiftable belts on said devices having numbers thereon, a flexible chart in front of the belts and having lines of openings therein arranged in pairs, one iopening of each pair exposing the numbers on the belts, and disks rotatably secured to the back of the chart between the belts and the latter and having numbers thereon eX- yposab-le through the remaining opening of each of said pairs of openings.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence ot' two witnesses.

RICHARD ROBERTV ANDERSON.

lVitnesses:

FANNY M. TANNAHILL, WILLIAM J. ANDERSON.

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